Senior JS Software Engineer – Ledger Live

Ledger is a leader in security and infrastructure solutions for cryptocurrencies and blockchain applications. We develop hardware wallets, a physical key to keep your crypto assets safe – Ledger Live

We’re making the world of digital assets accessible and secure for everyone.

Join the mission.
Founded in 2014, Ledger is the global platform for digital assets and Web3. Over 15% of the world’s crypto assets are secured through our Ledger Nanos. Headquartered in Paris and Vierzon, with offices in the UK, US, Switzerland, and Singapore, Ledger has a team of more than 700 professionals developing a variety of products and services to enable individuals and companies to securely buy, store, swap, grow and manage crypto assets – including the Ledger hardware wallets line with more than 5 million units already sold in 180 countries.
At Ledger, we embody the values that make us unique: Pragmatism, Audacity, Commitment, Trust, and Transparency. Have a look at our Origins video here.


Your mission:

    • You join the Ledger Live engineering team to maintain and develop on Ledger Live stack, involving Ledger Live apps (mobile and desktop) and its ecosystem
    • You maintain and develop new ideas around it on existing and future tooling projects (example: automated testing of crypto transactions with a bot, command-line interface, internal/external tooling)
    • Your work involves working 100% on Open Source projects: ledger-live-mobile, ledger-live-desktop as well as ledger-live-common (business logic) and ledgers (hardware communication)
    • Helping our QA team to automate even more our testing approaches
    • Be involved in investigating bugs in the complex world of blockchains edge cases


What we’re looking for:

    • Engineer profile with at least 8 years of experience in Software development
    • You have a strong background/interest in algorithm development and optimization to work on our stack: work with device in binary, work with blockchain technologies, …
    • You have a good knowledge of JavaScript and are comfortable working with type systems (TypeScript / Flowtype)
    • You have a good knowledge of DOM / CSS and UI libraries like React
    • You are curious to learn how blockchain works under the hood and investigate deeply complex systems
    • Nice to have: functional programming, experience in GraphQL, open source experience


What’s in it for you?

    • Competitive compensation package, and and ESOP according to the Company policyFlexible working hours, remote friendly environment
    • Strong focus on personal development, including internal and external trainings, and attendance to conferences, Internal talks, technical meetups, and hackathons
    • High performance equipment for your work
    • 5 weeks of paid vacation + 10 days of RTTComprehensive health insurance with medical, dental, and vision coverage
    • Meal Vouchers with Swile (ex Lunchr)Reimbursement for sports and cultural activities
    • Annual company outing for Ledgerdary Days, plus frequent parties, snacks and drinksEmployee discount on Ledger products

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